Staple-forming machine.



No. 86mm PATENT@ JULY 3o, 1907. w. N. HUNTER.

STA-@LE EUR5/ENG MACHINE.

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WILLIAM N. HUNTER, OF BLANCHESTER, OHIO.

STAPLE-FORMING MACHINE.

' Speciication of Letters Patent.

atented July 30, 1907.

Application filed August 11,19OBi-.4Serial No. 330,.

The invention relates to improvements in machines for feeding and cutting wire to form staples, more par.

ticularly designed for use in connection machines.

In the drawings, Figure lis a longitudinal section through a portion of the brush machine, to which my improvements are applied. Fig. 2 is a transverse section thereof; Fig. 3 is a sectional perspective view of the ywith brush l wire severing mechanism; Fig. 4 is a sectional elevation thereof; Fig. 5' is a sectional elevation of a wire feeding mechanism; and Fig. 6 is a section in a plane transverse to Fig. l through the wire feed.

The brush machine in connection with which my stapling mechanism may be employed may be of any suitable construction and forms no partei my present invention, except as hereinafter set forth. In gf neral, this machine comprises a bunch grabber and carrier having the cooperating members M, M', which are laterally reciprocated to 'transfer the bunch in position forengagement with -the stapling mechanism. The operating means for this mechanism is not illustrated and the parts are merely shown in one position to indicate their relation to the stapling mechanism.

Above the parts M, M is arranged a rotary head G inclosed in a casing Il, this head being revolved by aA rotary shaft C on which it is mounted` This head is provided with suitable cams, which will be hereinafter specifically described, for operating various parts oi the mechanism, ythe arrangement being such that the staples are successively formed in a position above I the parts M, M and are `then engaged with a bunch of bristles held by said parts M, M and subsequently driven downward into engagement with the brush head which is located on a shelf or work support L therebeneath. v

The mechanism comprises means for feeding the Wire and for cuttingr said wire into the required lengths for the staples, and also for forming pointed. ends thereon. YThe feeding mechanism comprises a pair of rolls or rotary feeding disks O, the former being provided with a projecting segment which intermittently coperates with the other disk to feed the wire. These disks O are mounted upon shafts O2, secured in bearings upon the casing H. At their upper ends they are connected together by gears 'O and are driven from the shaft C through the medium of bevel gears O5. At their lower ends, the shafts O2 engage with adjustable bearings O which are yieldingly seperated from each otherl by the spring O7 and upon opposite sides of said bearings are the adjusting screws O8 by means of which they may be adjusted in positionto move the disks O in proper relation for feeding. These disks O are groove'd for the reception of the wire and are preferably knurled so as to from a better hold upon the wire.

From the feeding disks. O the wire is passed horizontally into the cutter P. This consists of a block P- which hasformcd therein a recess containing a segmental die with which the punch I2 engages. The'r wire is fed transversely through the recess preferably by the guide I3 which directs the wire across the segmental die at one side of the center thereof and preferably with the outer edge of the wire substam tially tangential to the inner face of the segment of the recess. "lne wall of the segment on `the side that the wire enters is cut away so that in the operation of the punch the wire will be sheared only upon the op posite side of the segment and this severing operation will cause the cutting of the wire obliquely so as to produce oppositely sharpened ends. The movement of thepunch will carry with it the end of the unsevered r,portion of the Wire, 'but this `movement is permitted without shearing or cutting out any portion ol the wire by reason oi the recess in the wall of the segment. In the return movement of the punch the wire is bent back again so as to be in position for another' feeding operation, this being effected by the follow/er P", which is actuated in one direction by the spring P5. The movement of this follower' is limited by the stop pin I which engages the recess P7 in the block P.

From the cutter P the wire passes into engagement l Witlra staple .formingrnechanism which may be of any suitable construction,but preferably comprises a pair jaws Q which are pivotally attached to the vertical rdciprocating bar QC This bar is actuated by a cam groove Q2 in the rotary head G with which the roller Q on the bar Q/ engages. The bar Q is slidingly secured in the bar Q" which is provided with a T-shaped head Q5 and is slidingly secured in bearings -in the casing H. 4This bar' Q4 has attached to its lower end the punch Q which is adapted to coperate with the jaws Q in the manner to be hereinafter set forth. `The head Q5 is provided with a cam slot Q7 with which the crank roller Q on the head G engages. Thus in the rotation of the head G the bar Q* will be reciprocated through the actuation of the roller Q8 andv during this reciprocating movement an independent movement will be imparted to 'the bar Q through the medium of the roller Q3 engaging the cam slot Q2.

Pivot-ally attached to the casing H is -ananvil R. This is preferably in the form of a bell crank at the lower @21d oi whichsis'arranged a projecting lug R forming the anvil proper, `ylheouterarn. R2 of the bell crank engages with the cam slot ld:i in the head G through the medium oi the roller R4. This cam slot is so shaped that during vthe rotation of the head G the anvil R will be actuated to move the lug R into the path oi the jaws Q and retain it in that position for an interval, after which the bell crank is again actuated to withdraw said lug. The timing oi the parts is such that during the feeding movement oi' the Wire, the jaws Q and their actuating bar Q will remainstationary.v Fur'- thermore, thejaws Q are held in close relation to each lother by means of a punch cam e engaging their upperends closing said jaws at their lower ends so as to permit the wire to be fed therein without danger of the end of the -wire catching in between the jaws. When the wire has been fed therequired distance movement will be imparted to the bell crank lever R carrying the 15 lug or anvil R7 upward and simultaneously the jaws Q are separated so as to permit said lug to press on said wire betwoen'the jaws. This will form a4 clamp for firmly holding the wire during the severing operation. In order that the severed portion of the wire may be 2,0 held lfrom accideptal disengagement from the jaws, 'it is desirable that the anvil shall press against the wire with a uniform tension, this tension being just sufficient to 'clamp the wire without bending it. I have there'- ore provided the actuating connection for the anvil 25 with a slight lost motion and :have arranged a spring R5 which when the anvil is moved upward will yieldingly press the same against` the wire in engagement with the jaws. As soon as this section is severed, movement is yimparted tothe bar Q which will press the' jaws down- 3dv ward and around the anvil lug Rf, thereby bending the severed section of the wire into staple form; The anvily R is'then withdrawn out of the path of` the jawsl `and the latter will continue their downward movement uns 'til` the staple is engaged with the bunch, which latter -has been moved bythe grabber mechanism previously described intofthe path of. the staple. As soon as the staple has been engaged with the bunch, the jaws Q will be moved towards each other, so as to bend the ends of the staple rtogether and around the bunch. 4()` This movementis effected preferably by a projecting luglc on the bar 'Qfmuhich is adapted to pass between pins f on the jawsamd acts as a cam to separate said jaws at theiruppen'ends, thereby closing them together at ytheir lower ends, and pinching the staple. Moreover, the -movement of the jaws will causel them to tightlyy grab the bunch, holding the same in the recess gat the lower end of the jaws. i Simultaneously the I grabber actuating mechanism will be actuated to re? turn the grabber, but before the bunch-holding jaw is moved, the needle M will 'be returned suliciently to disengage from 'the lower` edge of the bunch and permit i the latter to be carried by the jaws Q out oi engagement,

withthe jaw M.l

. Alter the movement just described the' jaws yQV willbe v `carried downward by the movement of the bar Q until 'they contact with the upper'faee of the brush block, which iswlocated on the tableL and. is arranged by theoperatori with one'of its apertures in alinement with the fjaws Q. As soonas this point is reached, furthermore-vment ofthe jaws is arrested but thebar Q* will-continue' ,its movement carrying the punch Q downward .be-

tween the jaws until its lower end A(iontac'ts .with the e staple; lth'e'cani `e passes from engagement with the 'pins' upper'e'rid'of thelstaple. Before contacting with;y

' f o'n tli jaws Qpermitting the holding portions of the lupon the punch P2.

. punch is effected by the spring v jaws to move apart by the actuation of the spring d so astto disengage from the staple and allow the latter'to be forced by the punch Q downward in the aperture in the brush block.

During the continued movement of the punch in; Q)

driving the staple downward and driving the same into the wood7 the jaws Q renlain'stationary and also remain in this position during the initial upward movement of` the punch, thereby loperating as a presser foot which-,jv v

retains the'block from being drawn upward by fric-175 tional engagement with the punch. As soon as the K punch has been disengaged from the aperture in the brush head, 'the jaws Q will be again moved upward .by the actuation of the bar Q and the parts will bere-y turned to their initial positions. l l

The punch l?? is actuated in its operation by the lever Swhich vis fulcruined at S on the casing H and has one arm S2 extending into the path of the roller S3 onk the rotary head G. The opposite arm of lthis lever is provided `with a lug S4 which engages a slot in thehead S5' 85, Thus in the rotation of the head G the lever S will beactuated to reciprocate the `punch P2 at the proper time and the return movement of said S. The engagementoi v the lug S4 `with the slotted head S5 is such that the" 0a,

punch P2 is permitted a rotary adjustment in the die, 'I

and thus the cutting of the wire will not' always be @f fected by the same portion of the punch.

From the description above given, it will lbe cnt that my construction oi stapling mechanism has 95.* certain advantages among which are; first, thatlthe wire feeding mechanism is such as to permit of accurate adjustment so as to insure proper operation' at all Atimes and second, the wire cutting mechanism sharpens both l ends of the staples without wasting any portion of the wire. v j

yris illustrated in Figs. 3 and 4, the follower P4 is provided with a shoulder for engaging the wire and preventing displacement thereof during the severing op-r eration. 105.

What l claim as my invention is:

1.'A wire feeding mechanism comprising a puirol. ndjacent rotary feeding disks, laterally movable bearings in which snifl disks :irc jonrnzed, :l spring l'lctvvcen Sulfl beni" ings, und adjustable sions on opposite sides or suld bearings whereby said dlsks muy be -accurately' positioned in' relation (o euch other l'o feed the Wire. r

2. A wire cutter comprising u cylindrical block or die, a cutting punch adapted :for recproca tion in sold die. und menus for feeding the wire transversely through the cylindrlcal recess of the said die at one side of the center thereof, the wall of said die being cut away at the edge.

3. The combination with means for intermittently flee( -l lng the wire, of u cyllndrlal cutter adapted to oblquely shear the wire, und means for straightening the portlon12l') of tzhewb'e dellecterl ln shearing.

4. The combination with menus for intermittently feed.-l lng-the wlre, of a cutter comprising a statlona'ryatund il` movable member coilperntlng toobllquely shunt" the movable `member deccl'lng the cud of "chel A t portion of tbe wire, und means operutingupon.the'return l of sold movable member for straightening the dellected'end of the: wire. "y v; l 5; The combination with menns'ror Intex-ml ,n y:feed` 1 lng the wire, of n cutter comprising; a punch und die between which said wire vls fed, one` wall ol'lsuld die being cut away to permit or lateral deflection ot a portieri cip-said wireaand a spring pressed followerfor-straightening sali] 4im; the wire, of a cutter comprising' a inuuchm die h@ tween' which smid wire is Imi obiiqueiy io the cutting edge oi' the die, Lhcppposiie wzlli of smid die being cut mvny to" permit oi' Intera] doiieulion of the wire, und u spring pr .d follower iu said die adapted to sti-:lighten the de- Iicciud und of Suid wire upon lim rcturu movement of Suid punvh.

7. A wir@ cutter Comprising i cylindrical punch, :i

Y conipknlentnry dio having' :l poriiou of iis ":iil Cui ziwziy,

und means for projecting the wire boiwein .smid puuph und die to olliiqueiy cross the periphery of i'he punch :1nd also cross the cult-:lvuy portion of the die.

two uitnexsus.

\ 5i. The combination with n punch nud die, of moans olf feedingwirc hriwlwu Suid punch and din io cross a poriiou of ihrl poripiwry ihm-uni' obiiqueiy, :i spring'pressed Loilowor iu Suid din, ugniusL which the punch is pressed, :imi :i yhouhlcr on :mid follower for holding the Wire from dispIm-oumm.

In lvsliniony whereof I affix my signature in preseniv of:

WYLLAM N. HUNTER.

Wi t nossvs i:

A, J. HOLMES,

Flinn. LANuFm'rz. 

